Algebraic expression the sum of 12 and k​

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line

What is the multiple zero and multiplicity of f(x) = (x ? 3)(x ? 3)(x + 5)? multiple zero is 3; multiplicity is 2 multiple zero is 5; multiplicity is 1 multiple zero is ? 5; multiplicity is 1 multiple zero is ? 3; multiplicity is 2

How can (square root of 25) ^2 be rewritten?